package DataStructure.card;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class CardDemo {
    private final String[] suits ={"♥","♠","♦","♣"};

    /*
    * 52张牌，无大小王
    *        J  Q  K
    *        11 12 13
    */

    //买牌
    public List<Card> buyCard(){
        List<Card> cardList = new ArrayList<>();
        for (int i = 0; i < 4; i++) {
            for (int j = 1; j <=13 ; j++) {
                Card card = new Card(suits[i],j);
                cardList.add(card);
            }
        }
        return cardList;
    }

    //洗牌
    public void shuffle(List<Card> cardList){
        Random random = new Random();
        for (int i = cardList.size()-1; i >0 ; i--) {
            int index = random.nextInt(i);
            //index 与 i 交换
            swap(cardList,i,index);
        }
    }
    public void swap(List<Card> cardList,int a,int b){
        Card tmp = cardList.get(a);
        cardList.set(a,cardList.get(b));
        cardList.set(b,tmp);
    }

    /*
    揭牌：
    三个人，每个人轮流抓5张牌
     */
    public void getCard(List<Card> cardList){
        List<Card> hand1 = new ArrayList<>();
        List<Card> hand2 = new ArrayList<>();
        List<Card> hand3 = new ArrayList<>();

        List<List<Card>> hands = new ArrayList<>();
        hands.add(hand1);
        hands.add(hand2);
        hands.add(hand3);

        for (int i = 0; i < 5; i++) {
            for (int j = 0; j < 3; j++) {
                Card card = cardList.remove(0);
                hands.get(j).add(card);
            }
        }
        System.out.println("第1个人抓牌如下：");
        System.out.println(hand1);
        System.out.println("第2个人抓牌如下：");
        System.out.println(hand2);
        System.out.println("第3个人抓牌如下：");
        System.out.println(hand3);
        System.out.println("剩下的牌如下：");
        System.out.println(cardList);
    }
}
